ISSN 2070-7401 (Print), ISSN 2411-0280 (Online)
Sovremennye problemy distantsionnogo zondirovaniya Zemli iz kosmosa


Sovremennye problemy distantsionnogo zondirovaniya Zemli iz kosmosa, 2020, Vol. 17, No. 4, pp. 221-230

Characteristics of short-period internal waves in the Chukchi Sea based on spaceborne SAR observations

E.V. Zubkova 1 , I.E. Kozlov 2, 1 
1 Russian State Hydrometeorological University, Saint Petersburg, Russia
2 Marine Hydrophysical Institute RAS, Sevastopol, Russia
Accepted: 02.06.2020
DOI: 10.21046/2070-7401-2020-17-4-221-230
In this work, we present the results of short-period internal waves (IWs) observations in the Chukchi Sea based on the analysis of spaceborne Envisat ASAR data acquired in May – October 2007 and 2011. Analysis of 365 SAR images enabled to identify 112 IWs packets. Most of them (74 %) were identified in July and August. Main spatial characteristics of IWs trains were obtained, and their key generation sites identified. It is shown that IWs trains are spread over the sea rather inhomogeneously. Most of them are found near the 75 m isobath, at the shelf break near Chukchi Peninsula and in the vicinity of Cape Point Hope. Very small number of IWs was identified over the deeper parts of the sea (>100 m depths). As noticed, the total number of IWs identified over the Chukchi Sea is much smaller than it was observed earlier over the other Eurasian Arctic Seas, which is plausibly attributed to the relatively smooth bottom topography and weak tidal currents in this region, as well as lower area of open water in the sea.
Keywords: short-period internal waves, SAR imaging, Chukchi Sea, Arctic Ocean
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